Effect of Different Improvement Modes on Physical and Chemical Characters of the Coastal Saline Soil

doi:10.16258/j.cnki.1674-5906.2020.02.008

Ecology and Environment ›› 2020, Vol. 29 ›› Issue (2): 275-284.DOI: 10.16258/j.cnki.1674-5906.2020.02.008

• Research Articles • Previous Articles Next Articles

Effect of Different Improvement Modes on Physical and Chemical Characters of the Coastal Saline Soil

ZHANG Zixuan¹^,²(), NIU Beibei¹^,², LI Xinju¹^,²^,^*()

1. National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai’an 271018, China
2. College of Resources and Environment, Shandong Agricultural University, Tai’an 271018, China

Received:2019-09-17 Online:2020-02-18 Published:2020-04-01
Contact: LI Xinju

不同改良模式对滨海盐渍土土壤理化性质的影响

张子璇¹^,²(), 牛蓓蓓¹^,², 李新举¹^,²^,^*()

1.土肥资源高效利用国家工程实验室,山东泰安 271018
2.山东农业大学资源与环境学院,山东泰安 271018

通讯作者: 李新举
作者简介:张子璇（1996年生）,女,硕士研究生,主要从事土地整治与保护方面的研究。E-mail: 18554211381@163.com
基金资助:
山东省重大科技创新工程项目(2017CXGC0301)

Abstract

Abstract:

The Yellow River Delta is an important ecological protection base and land reserve resource area in China, which has been suffering from severe soil salinization. Therefore, exploring the effects of different functional materials on soil physical and chemical properties can provide theoretical basis for improving coastal saline soils and increasing crop yields. In this study, light-medium (T₁) and severe (T₂) coastal saline soils in the Yellow River Delta were taken as research objects. Three types of straw applications: straw mulch (F₁), straw burial (F₂), and straw mulch plus straw burial (F₃), and three kinds of modifiers addition: desulfurization gypsum (A), organic fertilizer (B) and desulfurization gypsum plus organic fertilizer (C), were combined into multiple improvement modes to conduct improvement experiments. By comparing and analyzing the effects of different improvement models on the physicochemical properties and nutrient changes of saline soils, the optimal improvement modes of coastal saline soils with different salinization levels were explored. Compared with returning green stage, soil moisture content of T₁F₂C treatment reached the highest value (40.65%) in the mature period, besides the average value of soil electrical conductivity showed the largest decrease (35.57%) compared with that under control treatment, and the salt inhibition efficiency (SIE) value reached the highest value (31.83%). Simultaneously the average moisture content of soils treated by T₂F₃C was as high as 29.26%, and the SIE value increased by 18.88%. The soil nutrients of T₁ and T₂ increased in different ranges. The following conclusions were drawn: straw application can reduce soil salinity and play a role in retaining water and fertilizer, and the order of overall effects is F₃>F₂>F₁; The combined apllication of desulfurized gypsum and organic fertilizer (C) has the best effect on controlling water loss and inhibiting the accumulation of soil salt, followed by separate use of organic fertilizer (B) and desulfurized gypsum (A). Generally, F₂C and F₃C treatments have better effects on water and salt improvement and nutrient enhancement of T₁ and T₂ soils, respectively, indicating that they are the best improvement models for light-medium and severe coastal saline soils, respectively. In addition, significant or extremely significant positive correlations were found between F₁/F₃ treatments and SOC content, F₁ treatment and the content of soil available phosphorus and available potassium, as well as F₂/CK treatments and soil alkaline nitrogen content, which revealled the effect of straw application on soil nutrients.

Key words: water and salt dynamics, soil nutrient, straw mulching, straw burying

摘要：

作为中国重要的生态保护和土地后备资源区,黄河三角洲地区土壤盐渍化现象较为严重,因此探究不同功能性物料对其土壤理化性质的影响可为滨海盐渍土土壤改良和提高农作物产量提供理论依据。以黄河三角洲轻中度（T₁）和重度（T₂）滨海盐渍土为研究对象,采取秸秆覆盖（F₁）、秸秆掩埋（F₂）和秸秆覆盖+掩埋（F₃）3种秸秆还田方式与脱硫石膏（A）、有机肥（B）和脱硫石膏+有机肥（C）3种改良剂添加方式组成多种改良模式开展改良试验,通过对比分析不同改良模式对盐渍土土壤理化性状及土壤养分变化的影响,探究不同程度滨海盐渍土的最优改良组合。结果表明：成熟期与返青期相比,T₁F₂C处理的土壤含水率达最高值（40.65%）,土壤电导率均较其对照处理呈现最大降幅（35.57%）,盐分抑制效率（SIE）值达最高值（31.83%）;T₂F₃C处理的土壤含水率均值高达29.26%,SIE值上升18.88%;T₁和T₂的土壤养分指标均呈现不同幅度的增加。得出以下结论：不同秸秆还田方式均可降低土壤盐分并起到保水保肥的作用,总体以F₃>F₂>F₁的效果呈现。对于控制水分损失、有效抑制土壤盐分表聚的作用来说,C>A>B;对于提高土壤肥力、增加土壤养分有效性的效果,C>B>A。总体上,F₂C和F₃C处理分别对于T₁和T₂土壤的水盐改善和养分提高效果较优,为两种程度盐渍土的最佳改良模式,可推广使用。对于不同秸秆还田方式下施肥对土壤养分含量的影响,F₁和F₃方式与土壤有机质含量,F₁方式与土壤有效磷和速效钾含量,F₂和无秸秆处理方式（CK）与土壤碱解氮含量在一定程度上呈显著或极显著正相关关系。

关键词: 水盐动态, 土壤养分, 秸秆覆盖, 秸秆掩埋

CLC Number:

S156.4
X144

ZHANG Zixuan, NIU Beibei, LI Xinju. Effect of Different Improvement Modes on Physical and Chemical Characters of the Coastal Saline Soil[J]. Ecology and Environment, 2020, 29(2): 275-284.

张子璇, 牛蓓蓓, 李新举. 不同改良模式对滨海盐渍土土壤理化性质的影响[J]. 生态环境学报, 2020, 29(2): 275-284.

Figures/Tables 11

References 25

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土壤盐化度 Classification of soil salinity	含水率 Moisture content/ %	电导率 Conductivity/ (μS∙cm^-1)	有机质 Organic matter/ (g∙kg^-1)	碱解氮 Alkaline nitrogen/ (mg∙kg^-1)	有效磷 Available phosphorus/ (mg∙kg^-1)	速效钾 Available potassium/ (mg∙kg^-1)
轻中度盐渍土 Light and moderate Saline soil	30.96	1242	12.72	93.02	11.08	250.30
重度盐渍土 Severe saline soils	17.09	2970	7.76	60.80	5.75	185.70

土壤盐化度 Classification of soil salinity	含水率 Moisture content/ %	电导率 Conductivity/ (μS∙cm^-1)	有机质 Organic matter/ (g∙kg^-1)	碱解氮 Alkaline nitrogen/ (mg∙kg^-1)	有效磷 Available phosphorus/ (mg∙kg^-1)	速效钾 Available potassium/ (mg∙kg^-1)
轻中度盐渍土 Light and moderate Saline soil	30.96	1242	12.72	93.02	11.08	250.30
重度盐渍土 Severe saline soils	17.09	2970	7.76	60.80	5.75	185.70

处理Treatments	秸秆还田方式 Straw returning method	是否添加脱硫石膏Whether to add desulfurization gypsum	是否施加有机肥 Whether to add organic fertilizer	处理 Treatments	秸秆还田方式 Straw returning method	是否添加脱硫石膏 Whether to add desulfurization gypsum	是否施加有机肥 Whether to add organic fertilizer
F₁A	秸秆覆盖 Straw mulching	√		F₃A	秸秆覆盖+ 秸秆掩埋 Straw covering and straw burying	√
F₁B			√	F₃B			√
F₁C		√	√	F₃C		√	√
F₁CK				F₃CK
F₂A	秸秆掩埋 Straw burying	√		CKA	对照 Control	√
F₂B			√	CKB			√
F₂C		√	√	CKC		√	√
F₂CK				CKCK

处理Treatments	秸秆还田方式 Straw returning method	是否添加脱硫石膏Whether to add desulfurization gypsum	是否施加有机肥 Whether to add organic fertilizer	处理 Treatments	秸秆还田方式 Straw returning method	是否添加脱硫石膏 Whether to add desulfurization gypsum	是否施加有机肥 Whether to add organic fertilizer
F₁A	秸秆覆盖 Straw mulching	√		F₃A	秸秆覆盖+ 秸秆掩埋 Straw covering and straw burying	√
F₁B			√	F₃B			√
F₁C		√	√	F₃C		√	√
F₁CK				F₃CK
F₂A	秸秆掩埋 Straw burying	√		CKA	对照 Control	√
F₂B			√	CKB			√
F₂C		√	√	CKC		√	√
F₂CK				CKCK

作物生长期 Crop’s growth stage	秸秆还田方式 Straw returning method	处理 Treatments	电导率 Conductivity/ (μS∙cm^-1)	作物生长期 Crop’s growth stage	秸秆还田方式 Straw returning method	处理 Treatments	电导率 Conductivity/ (μS∙cm^-1)
返青期 Returning green stage	T₁F₁	CK	754.21±41.47ab	成熟期 Ripening Stage	T₁F₁	CK	850.28±46.75bc
		A	664.08±36.52de			A	701.17±38.56de
		B	694.16±38.17bcd			B	789.41±43.40cd
		C	658.32±36.19de			C	652.28±35.86e
	T₁F₂	CK	701.05±38.56bc		T₁F₂	CK	832.35±45.76bc
		A	637.34±35.04d			A	640.19±35.20e
		B	675.07±37.13de			B	743.32±40.87d
		C	553.33±30.42e			C	536.26±29.48f
	T₁F₃	CK	776.37±42.68a		T₁F₃	CK	893.17±49.12ab
		A	643.18±35.37d			A	687.21±37.79de
		B	691.21±38.01cde			B	738.17±40.59d
		C	630.13±34.65d			C	659.28±36.52e
	T₁CK	CK	768.19±42.24ab		T₁CK	CK	933.19±51.32a
		A	746.31±41.03ab			A	887.21±48.79ab
		B	697.14±38.34bc			B	896.34±49.28ab
		C	658.21±36.19de			C	868.19±47.74ab

Effect of Different Improvement Modes on Physical and Chemical Characters of the Coastal Saline Soil

不同改良模式对滨海盐渍土土壤理化性质的影响

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作物生长期 Crop’s growth stages	秸秆还田方式 Straw returning method	处理 Treatments	有机质 Organic matter/ (g∙kg^-1)	有效磷 Available phosphorus/ (mg∙kg^-1)	碱解氮 Alkaline nitrogen/ (mg∙kg^-1)	速效钾 Available potassium/ (mg∙kg^-1)
返青期 Returning green stage	T₁F₁	CK	14.91±0.97ab	4.91±0.32d	64.90±3.89f	278.16±16.68f
		A	16.80±1.09cd	8.34±0.54cd	107.12±6.42cde	364.31±21.84bcd
		B	19.11±1.24bc	8.62±0.56cd	136.31±8.16a	461.21±27.66a
		C	16.15±1.05d	8.11±0.53cd	116.22±6.96bc	396.27±23.76b
	T₁F₂	CK	16.71±1.09cd	7.91±0.51cd	83.10±4.99e	345.35±20.70de
		A	18.50±1.20bcd	11.12±0.72bcd	112.41±6.72bcd	393.29±23.58bc
		B	17.09±1.11cd	8.22±0.53cd	110.13±6.60bcd	320.16±19.20e
		C	20.91±1.36ab	13.15±0.85bcd	132.21±7.92a	432.31±25.92a
	T₁F₃	CK	16.94±1.10cd	9.23±0.59cd	81.70±4.90e	347.27±20.82de
		A	17.91±1.16bcd	10.36±0.67ab	82.70±4.96e	391.18±23.46bc
		B	18.40±1.20bcd	16.61±1.08a	134.40±8.04a	388.33±23.28bc
		C	18.28±1.17cd	10.73±0.70bcd	119.33±7.14b	358.19±21.48bcd
	T₁CK	CK	18.36±1.17bcd	7.56±0.49cd	82.50±4.95e	356.21±21.36cde
		A	18.62±1.21bcd	8.93±0.58bcd	99.20±5.95de	371.19±22.26bcd
		B	18.31±1.19bcd	12.62±0.82bcd	108.13±6.48cde	387.22±23.22bc
		C	23.75±1.54a	18.72±1.22abc	104.43±6.24de	446.41±26.76a
成熟期 Ripening stage	T₁F₁	CK	15.40±0.99d	11.82±0.77bc	84.60±5.08e	310.29±18.60e
		A	17.53±1.14bc	6.51±0.42cd	109.18±6.54cd	346.16±20.76cde
		B	17.33±1.12bc	11.84±0.77bc	125.26±7.50bc	396.27±23.76bc
		C	21.20±1.37a	16.11±1.05ab	104.19±6.24cd	445.11±26.70a
	T₁F₂	CK	15.65±1.01d	7.43±0.48cd	101.31±6.06cde	344.38±20.64de
		A	16.72±1.09bcd	5.14±0.33d	147.24±8.82ab	347.13±20.82cde
		B	16.91±1.10bcd	9.91±0.64bcd	170.41±10.20a	360.21±21.60cd
		C	19.92±1.29ab	18.62±1.21a	153.19±9.18ab	402.26±24.12bc
	T₁F₃	CK	15.73±1.02cd	6.41±0.42cd	89.70±5.38e	329.19±19.74de
		A	16.63±1.08cd	8.91±0.58bcd	168.14±10.08a	347.31±20.82cde
		B	18.62±1.21ab	15.93±1.03ab	112.27±6.72bcd	410.25±24.60ab
		C	17.64±1.14abc	9.65±0.62bcd	120.19±7.20bcd	371.17±22.26bcd
	T₁CK	CK	16.32±1.06cd	8.41±0.55cd	109.32±6.54cd	361.19±21.66cd
		A	19.53±1.27ab	13.72±0.89bc	93.20±5.59cde	381.36±22.86bcd
		B	17.50±1.14bc	12.84±0.83bc	109.06±6.54bcd	392.21±23.52bc
		C	20.84±1.35a	19.81±1.29a	136.14±8.16bc	426.14±25.56ab

作物生长期 Crop’s growth Stage	秸秆还田方式 Straw returning method	处理Treatments	电导率 Conductivity/ (μS∙cm^-1)	作物生长期Crop’s growth stage	秸秆还田方式 Straw returning method	处理Treatments	电导率 Conductivity/ (μS∙cm^-1)
返青期 Returning green stage	T₂F₁	CK	1634.11±89.87a	成熟期 Ripening stage	T₂F₁	CK	1897.16±104.34ab
		A	1305.09±71.78ab			A	1392.22±76.56bc
		B	1505.25±82.78ab			B	1520.12±83.60abc
		C	1273.31±70.02ab			C	1345.31±73.98bc
	T₂F₂	CK	1624.22±89.32a		T₂F₂	CK	1860.17±102.30ab
		A	1353.43±74.42ab			A	1513.22±83.22abc
		B	1496.31±82.28ab			B	1534.41±84.37abc
		C	1302.17±71.61ab			C	1495.31±82.23abc
	T₂F₃	CK	1609.33±88.50ab		T₂F₃	CK	1799.14±98.95ab
		A	1183.19±65.07ab			A	1177.40±64.74cd
		B	1382.20±76.01ab			B	1296.35±71.28bc
		C	1091.33±60.01b			C	929.41±51.10d
	T₂CK	CK	1674.41±92.07a		T₂CK	CK	2007.30±110.39a
		A	1459.21±80.25ab			A	1814.21±99.77ab
		B	1506.19±82.83ab			B	1870.22±102.85ab
		C	1403.31±77.17ab			C	1751.18±96.31abc

作物生长期 Crop’s growth stage	秸秆还田方式 Straw returning method	处理 Treatments	ω_{(Organic matter)}/ (g∙kg^-1)	ω_{(Available phosphorus)}/ (mg∙kg^-1)	ω_{(Alkaline nitrogen)}/ (mg∙kg^-1)	ω_{(Available potassium)}/ (mg∙kg^-1)
返青期 Returning green stage	T₂F₁	CK	11.81±0.77b	5.11±0.33de	62.53±3.75de	254.33±15.24e
		A	14.10±0.92ab	5.80±0.38cd	84.61±5.08bc	295.21±17.70de
		B	13.72±0.89ab	7.15±0.46bc	64.30±3.86de	289.19±17.34de
		C	13.51±0.88ab	5.82±0.38cd	75.44±4.52bcd	305.15±18.30cd
	T₂F₂	CK	13.43±0.87ab	2.85±0.18f	61.13±3.67de	260.31±15.60cd
		A	16.90±1.10a	5.71±0.37cd	70.16±4.21cd	325.26±19.50cd
		B	16.31±1.06a	4.13±0.27ef	93.53±5.61ab	341.11±20.46bc
		C	16.63±1.08a	4.82±0.31de	102.42±6.12a	283.16±16.98bc
	T₂F₃	CK	13.62±0.88ab	4.40±0.26ef	82.30±4.94bc	279.26±16.74bc
		A	15.20±0.99ab	5.51±0.36de	87.51±5.25ab	333.31±19.98bc
		B	14.91±0.97ab	5.24±0.34de	83.83±5.03bc	302.21±18.12abc
		C	17.09±1.11a	4.61±0.30de	90.44±5.42ab	345.27±20.70abc
	T₂CK	CK	13.61±0.88ab	5.82±0.38cd	53.71±3.22e	262.22±15.72ab
		A	14.32±0.93ab	5.30±0.34de	76.45±4.58bcd	270.30±16.20ab
		B	15.50±1.01ab	10.51±0.68a	72.92±4.37cd	319.19±19.14ab
		C	14.81±0.96ab	7.94±0.51b	65.91±3.95cd	375.31±16.50a
成熟期 Ripening stage	T₂F₁	CK	15.43±1.00cde	9.50±0.62de	109.34±6.54cde	358.21±21.48e
		A	18.90±1.23ab	10.33±0.67cd	135.31±8.10bc	340.29±20.40de
		B	18.31±1.19bc	15.21±0.99a	143.24±8.58b	430.33±25.80de
		C	16.82±1.09bcd	12.94±0.84ab	133.41±7.98bc	450.17±27.00cde
	T₂F₂	CK	13.31±0.86e	4.91±0.32f	94.60±5.68e	331.31±19.86cd
		A	20.24±1.31ab	12.90±0.84ab	105.21±6.30cde	463.21±27.78cd
		B	22.61±1.47a	16.14±1.04a	180.32±10.80a	378.19±22.68cd
		C	18.50±1.20abc	14.60±0.95a	185.41±11.10a	338.08±20.28cd
	T₂F₃	CK	13.21±0.86e	5.51±0.36f	95.30±5.72de	295.31±17.70c
		A	17.21±1.11bcd	8.82±0.57de	99.81±5.99de	328.22±19.68b
		B	14.41±0.94de	12.34±0.78bc	117.41±7.02bcd	429.21±25.74b
		C	18.31±1.19abc	10.23±0.66cd	137.15±8.22bc	567.43±34.02b
	T₂CK	CK	15.21±0.98de	8.11±0.53e	106.31±6.36cde	336.15±20.16b
		A	15.82±1.03cde	10.64±0.69cd	116.22±6.96bcd	358.18±21.48b
		B	17.21±1.12bc	16.41±1.07a	124.30±7.44bc	436.31±26.26b
		C	22.20±1.44a	10.83±0.70cd	111.21±6.66bcd	430.10±25.80a

秸秆还田方式 Straw returning method	有机质 Organic matter	有效磷 Available phosphorus	碱解氮 Alkaline nitrogen	速效钾 Available potassium
F₁	0.667*	0.855*	0.489	0.732**
F₂	0.447	0.572	0.673*	0.319
F₃	0.579*	0.490	0.390	0.261
CK	0.544	0.339	0.730**	0.613

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